Relay



Jan. 7, 1941. D UM 2,228,069

RELAY Filed Oct. 21, 1958 my 63 ms Insulation WlTNESSESz' INVENTOR Donald Baum- Patented Jan. 7, 1941 UNITED STATES PATENT OFFICE RELAY Donald Baum, Ridgewood, N. .L, acsignor to Westing once Electric Elevator Company, Jersey Ci y, N. 1., a corporation of Illinois Application October 21, 1938, Serial No. 236,219.

Claims. (01. 175-336) My invention relates to electromagnetic re- 22 which extends through an aperture 2! in the lays of the telephone type for receiving or conarm It, when the armature is pivotally mounttrolling a plurality of electric circuits. ed in the frame. The side walls of the aperture One object of the invention is to produce a re- 28 act as a suitable means for limiting the piv- 5 liable and accurate relay which may be ecootal movement of the armature. A boss 28 of 5 nomically manufactured and assembled. non-magnetic material is welded upon the lace Another object is to provide a relay in which of the armature extension 21 to rest against the the core and coil may be removed and replaced wall of the aperture 28 when the armature is in as many times as desired without the necessity its released position. The short arm 2i of the m of readjusting the position of the core with refarmature is likewise provided with a boss 30 of erence to its armature. non-magnetic material on its inner face for en- A further object is to reduce the number of gagement with the relay core l2 when the core parts usually required in constructing relays of is energized. the telephone type. The core is provided with suitable insulating 5 For a better understanding of the invention, washers 32 and 33 near its ends which serve to 5 reference may be had to the accompanying provide a spool for a magnetizing coil 34 wound drawing, in which: upon the core, so that it may be energized when- Flgure 1 is a top plan view of a relay embodyever the ends 35 and 36 of the coil are connected ing my invention; to a suitable source of electrical energy. Fig. 2 is a view in side elevation of the relay The core with the coil thereon is mounted in 50 shown in Fig. 1; the relay by means of an adjusting screw 38 and Fig. 3 is a view taken on the line 111-111 of a hol s w The adjusting screw is Fig. 2; I mounted in the core arm it of the frame with Fig. 4 is a view taken on the line IV-IV of its inner end disposed inside the arm in posi- Fig. 2; and, tion to be engaged by one end of the core i2. 35 Fig. 5 is a view in perspective of the armature The holding Screw 39 ds through the adembodied in the relay. lusting screw 38 and into the end of the core,

Referring more particularly to the drawing, 0 th t whe t e holding screw is tightened in the relay comprises a frame In in which is its p i in th core, it will hold the end of mounted an armature ii and an energizing core the co e firmly against the inner end of the ad- 30 i2. The frame is shown as constructed of suitlusting SereW- A 1001! ut ll is disposed on the able metal plate cut and pressed into a substanadjusting screw to l i fi y n the position tially U-shaped form having a body portion is in the core arm ii to which it has been adjusted. with end arms l5'and it. The end arm I! is With this construction, it w be pparent bent at approximately right angles to the bod that the core i2 may be mounted with its free It, and is provided with suitable means such as end di p adjacent to the bo s III on the machine screws I] for mounting th relay upon armature, and that the distance between the any suitable support (not shown). The arm it f end 9 the core and th s 0 may be adis also bent at approximately right angles to Justed y rotating the adjusting screw 38 in the o th body l4 and m t same direction and arm It until the core is in the desired position, 0 proximately parallel to the arm i5, and then turning the nut II to lock the adjust- The body 14 is also provided at its sides with e screw i h position t will also e na pair 1 bent-oveplugs l9 nd 20, h h extend parent that the core may be released from its inwardly and parallel to the sides of the frame to su p t y unscrewins e holding sc ew 39. and

5 form a supporting means for the armature Ii. that the core or another similar core may be The armature ll may be constructed of suitable 8 replaced in Operative P i n y merely flat metal plate cut and pressed into a substanscrewing the holdins screw 39 i o its mounttially L-shape and having a short arm 2i and a s Inasmuch as he addusting screw will long r 22, A pair of lugs 13 and 1 are b hold its position unless the lock nut 40 is loosrearwardly at the base of the arm 22, so that the ehed. i Will be S n h t the u ng cr w 50 armature may be pivotally mounted in its oppositions the core or any similar core in its corerative position in the relay frame by running rect position at all times with reference to the 9.- p152! through apertures 26 in the lugs 0n the armature, and that no new adjustment is necesframe and on the armature. The armature is sary when the core is removed and replaced, or

it provided with a narrow extension 21 on its arm when a new core is substituted for the old core.

In order to maintain the free end of the core in correct operative position with reference to the armature arm 2|, a bracket or bridge 42 of suitable insulating material is mounted thereon with its feet 43 and 44 extending into engagement with the body l4 of the frame. The feet 43 and 44 may be provided with notched corners which fit over the corners of the body [4 to prevent any sideway movement of the bridge. A suitable aperture 45 between the feet of the bridge permits the armature to have free-play in its pivotal movement when it is operated by the core 12.

A pair of spring switch arms 48 and 49 are mounted on the outer face of the body H by means of a plurality of insulation blocks 58 and a pair of screws 5| and 52. The spring arms are provided with suitable contact members 58 and 54 which are spaced apart a suitable distance by means of a stiff spacing arm 55. An insulating plug 5'! is mounted upon the under-side of the free end of the spring arm 48 by means of a rivet 58. The plug extends downwardly through a hole 59 in the frame I4 in position to be engaged by an extension 80 on the operating arm 22 of the armature. A similar group of spring arms 53 and 64 are mounted on the other side of the outer face of the frame body l4 by means of similar insulating blocks 85 in the same manner as the spring arms 48 and 48 are mounted, and are disposed to be operated by the armature arm 22 in the same manner as it operates the spring arm 48. A pair of terminal members or binding posts 86 and 81 are mounted above the spring switch arms and tightly held in the groups of insulating blocks 50 and 65 to constitute suitable fastening means for the leading ends 35 and 36 of the coil on the core [2. The ends 85 and 36 may be secured to the binding posts by suit- 0 able screws 88 and 68.

From the foregoing description it will be apparent that, if the terminal members 56 and 81 are connected to a suitable source of electric energy, the coil 34 will be provided with power to energize the core [2, and cause it to attract the short arm 2| of the armature. This movement of the short arm of the armature causes its long arm 22 to rise against the insulating plugs 51 on the under-sides of the spring arms 48 and 63, and thereby close the contact members mounted on the arms 48 and 49 and the contact members mounted on the spring arms 58 and 84. When the coil 34 is disconnected from its source of power, the core will be deenergized, the armature arm 2| will be released, and hence the armature arm 22 will be moved downwardly by the'spring action of the spring arms 48 and 83, thus opening the contact members mounted on the cooperating spring arms.

By the foregoing description it will be apparent that I have provided a very simple relay construction having few parts and parts that are easily and economically pressed into form, and that I have also provided a relay in which the core and coil may be renewed, replaced or changed without the necessity of any adjustment of its mounting means except the adjustment necessarily made when the relay is first assembled and made ready for operation.

Although I have illustrated and described only one embodiment of my invention, it is to be understood that modifications thereof and changes therein may be made without departing from 7 the spirit and scope of the invention.

I claim as my invention:

1. A relay for operating a switch comprising a metal frame having a body portion and an arm on one end extending at approximately right angles to said body portion, a magnetizable core. an energizing coil disposed on the core, means for securing one end of the core to the inner side of the arm to cause the core to extend along but separate from the body portion of the frame, an insulating bracket fixed on the free end of the core with its feet disposed against the body portion of the frame to support and brace the free end of the core, an L-shaped armature having one arm disposed operatively adjacent to the free end of the core and its other arm disposed between the core and the body portion and extending between the feet of the bracket, and a pin for pivotally supporting the armature in its operative position.

2. A relay comprising a frame of flat metal plate pressed into approximately U-form and having a pair of lugs bent inwardly on its central body portion, an armature of flat metal plate pressed into L-shape with a short arm and a long arm and provided with a pair of lugs bent backwardly away from itself at the corner of its arms for cooperation with the lugs on the frame, a pin disposed in the lugs on the frame and the armature for pivotally mounting the armature with its long arm extending along the inner face of the central portion of the frame and its short arm extending approximately parallel to and between the arms of the frame, a magnetizable core, an energizing coil on the core, means for adjustably mounting the core on the frame comprising an adjusting screw disposed in one of the frame arms to space the core at a correct operative distance from the short arm of the armature, a holding screw mounted in the ad- Justing screw and extending into the end of the core engaged by the adjusting screw to hold the core with its free end extending toward the short arm of the armature, thereby permitting adjusting of the position of the core with reference to the armature, and an insulating bracket mounted on the core near its free end and having feet disposed to straddle the long arm of the armature and rest against the inner face of the central body portion of the frame to steady and brace the free end of the core in its position adjacent to the short arm of the armature.

3. A relay for operating a switch comprising a one-piece frame of metallic plate material pressed into substantially U-shape and having an inwardly extending lug on each side of its central portion and an armature-limiting aperture in the one of its arms, a magnetizable core having its one end mounted on the inner side of one of the arms of the U-shaped frame and its other end extending toward the other arm of the frame, a coil disposed on the core, an L-shaped armature provided with a pair of lugs bent away from itself for cooperation. with the lugs on the frame and having its one end disposed operatively adjacent to the free end of the magnetizable core and its other end disposed along the inner central portion of the frame between the core and the frame and extending into the limiting aperture in the frame, and a pin disposed through the lugs of the frame and the armature to provide a pivotal support for the armature.

4. A relay having a mounting frame comprising a body portion and an electromagnet-supporting arm extending therefrom at right-angles thereto, said arm being provided with a slot, an

electromagnet having a core, means for mounting one end of the electromagnet core on the inner face of the arm, an armature having an operating arm extending across the other end of the electromagnet and having a lever arm for operating an associated mechanism extending along said electromagnet toward the coil supporting arm, means for pivotally supporting said armature on said mounting frame, an extension on said lever arm extending into said slot to limit the movement of the armature, and nonmagnetic means for spacing a portion of said lever arm extension from a wall of said slot.

5. A relay having a mounting frame compris- 15 ing a body portion and an electromagnet-supporting arm extending therefrom at right-angles thereto, said arm being provided with a slot, an electromagnet having a core, means for mounting one end of the electromagnet core on the inner face of the arm, an armature having an operating arm extending across the other end of the electromagnet and having a lever arm for operating an associated mechanism extending along said electromagnet toward the coil supporting arm, means for pivotally supporting said armature on said mounting frame; and an extension on said lever arm extending into said slot to limit the movement of the armature.

DONALD H. BAUM. 

